'Supernatural' exec teases 'meta' episode

Supernatural showrunner Sera Gamble has revealed details of an upcoming episode that will break the fourth wall.

In November, series star Misha Collins (Castiel) first revealed that a "meta" episode of the CW drama was in development.

"We have an episode in which Sam and Dean find themselves in essentially... a parallel world," Gamble told TV Squad. "There is a television show called Supernatural and everyone seems convinced that they are actors named Jared Padalecki and Jensen Ackles."

Gamble promised that the final episode, entitled 'The French Mistake', will be "fall-on-the-floor hilarious".

"It appears that there are actors having a psychotic break on a set and the producers don't know what to do," she explained. "[Jared and Jensen] are so funny in this episode. And, you know, meta is not to everyone's taste, but I enjoy a nice slice of meta."

Supernatural returns to The CW on January 28. 'The French Mistake' is currently expected to air on February 18.